RU214507U1 - Device for repair work on an underground pipeline - Google Patents

Abstract

The utility model relates to devices for preventing pipe deformation during the repair of underground pipelines. A device for repair work on an underground pipeline contains a traverse with plates, to which a guide is rigidly fixed, two counter-parallel half-rings, equipped with lugs mounted on the guide with the possibility of movement, and fixed with bolted connections, while the half-rings are provided with recesses connected to protruding linings additional half rings and fixed with bolted connections. The traverse is provided with a mounting ring, or mounting hooks, or mounting holes. The main structural elements: traverse, plates, guide, semi-rings with recesses, additional semi-rings with protruding pads, mounting ring are made of metal materials or composite materials. Additional half-rings have an inner diameter corresponding to the types of pipeline diameters, and an outer diameter of protruding linings corresponding to the outer diameter of the recesses of the half-rings. The technical result consists in expanding the arsenal of technical means that prevent mechanical deformation of the pipeline and allow performing repair work on different diameters of pipelines due to the formation of a rigid closed ring tightly enclosing the pipeline and fixing the pipeline circumference. 3 w.p. f-ly, 9 figs., 2 pr.

Description

The utility model relates to devices for preventing pipe deformation during the repair of underground pipelines.

A known method of repairing pipelines, which is carried out in accordance with the "Regulations for cutting and inserting "coils" of connecting parts, plugs, shut-off and control valves and connecting sections of main oil pipelines RD 153-39.4-130-2002", approved on October 8, 2002, which is given in the level of technology of the patent document RU 2610798 C2, published on February 15, 2017 Bull. No. 5. This Regulation establishes the procedure for organizing and performing work to replace defective pipeline elements, such as a “coil”, a connecting piece, a plug, shut-off and control valves and connecting sections of main oil pipelines (including the “overlapping” method) with the centering operation . The disadvantage of this method of repairing the pipeline is that the regulations do not provide for rigid fixation of the ends of the pipeline before cutting, therefore, at the end of the first cut, the pipeline is deformed, for example, ovalization. The terms "pipeline", "pipe" in the context of this application are equivalent.

A known method of repairing defective sections of a pipeline in a trench (patent RU 2708758 C2, published on December 11, 2019 Bull. No. 35), which consists in determining the defective section, opening it, cutting it out and replacing it, characterized in that before cutting out the defective section, its critical stress is determined. - deformed state, assessment of the geological conditions of occurrence in the trench and geometric deviations from the axis, on the basis of which a conclusion is made about the danger of a "shot", and if it is present, the defective area is fixed with fixing devices that can be adjusted in the horizontal and vertical direction; after cutting out the defective area, centering is carried out using centering devices, while each fixing device consists of four or more screw anchors designed to securely fix the structure in the ground, two or more hinged supports on power cylinders that can be adjusted in height, included in a single the frame of the power station, two or more semi-grippers having a locking device, and mechanisms for horizontal and vertical adjustment of the ends of the pipeline, and the installation and dismantling, as well as the transportation of the fixing devices to the location of the pipeline, is carried out using manipulators located on the vehicle - on the chassis. This method makes it possible to increase the accuracy of centering and the accuracy of marking the joints of the pipeline and the repair "coil", which allows to improve the quality of performance and productivity of the work carried out, as well as to reduce the cost of repairs and labor intensity, but does not prevent the stress-strain state of the pipeline, therefore, deformation is possible, for example , ovalization that occurs at the end of the first cut.

A device for fixing and centering the ends of the pipeline when cutting out its defective section is known (patent RU 2763096 C1, published on December 27, 2021 Bull. No. 36), containing a platform mounted on traverses equipped with anchors, a rotator mounted on a hexagon, and power cylinders for adjusting the position the end of the pipeline in the vertical and horizontal directions, as well as a pipe gripper consisting of two flaps with locks actuated by means of power cylinders interconnected with the power station. The width of the platform exceeds the width of the trench, and holes are made on each side of it, guide cylinders are installed in them, the grip base is made of two prefabricated parts, which are interconnected by bolted joints, the lower surface of the grip base is connected to the grip arc, which is made of two half rings and connected by means of the gripping axis to the gripping flaps, small power cylinders are pivotally attached to the lower part of the gripping base, which are connected to the gripping flaps at the opposite end, along the edges of the upper part of the two ends of the pipeline there is a laser receiver - emitter, which consists of at least two laser devices , which are installed along the edges of the upper part of the ends of the pipeline and are equipped with an individual battery for each, a power station is installed separately, which is connected to large and small power cylinders using hoses or cables. This device increases the reliability of fixing the ends of the pipeline when cutting out a defective section due to fixing the position of the device itself before cutting and is aimed at ensuring alignment, but the gripping doors do not encircle the pipeline around the circumference with a complete rigid closed ring, which does not prevent deformation of the pipeline, for example, ovalization. In addition, this device has a complex structure, which can quickly fail in harsh climatic conditions, for example, due to the thickening of the hydraulic fluid, wear of the sealing rings, fragility of cables and hoses, etc.

A device is known for compensating stresses and protecting the joints of pipelines with concrete coating from loads and impacts (patent RU 182117 U1, published on 03.08.2018 Bull. No. 22), including paired half rings that fill the space of the butt joint of pipes with concrete coating and are interconnected by fasteners through eyes on one end and a hinge on the opposite. Paired half-rings are divided into modules of paired half-rings, in which the half-rings are interconnected by fasteners through lugs from one end and a removable hinge and fasteners placed in the lugs having the shape of a groove from the opposite end. Modules of paired semirings can be equipped with an internal reinforcing cage and made, for example, from a concrete mixture with nanomodified additives, or fiber-reinforced concrete, including those with nanomodified additives, or from a composite composition, and the reinforcing cage can be replaced with a mesh, for example, metal, polymer , or composite composition. The technical solution is used in line conditions with direct laying of the pipeline, since the modules of paired half-rings have a smaller mass, and there is no need to use heavy lifting equipment, and the installation operation is facilitated. But this solution does not provide a sufficiently rigid fixation of the shape of the pipeline circumference due to the use of a reinforcing cage and a concrete mixture for half rings, therefore, when performing repair work, for example, technological cutting of a defective section of the pipeline at the time of the end of the first cut, deformation may occur. In addition, paired half rings have a strictly defined size, therefore, use is possible only for one pipeline diameter.

A device for protecting the joint of a pipeline with a concrete coating is known (patent RU 2734727 C1, published on 10/22/2020 Bull. No. 30), including paired half rings with mounting loops on the outer surface and technological loops on one of the end surfaces, made of concrete and including a reinforcing a frame located inside the concrete body of the semirings, made of wire and including embedded parts, consisting of two plates and a bushing located between them and placed in through holes made in the platforms located in the recesses on the outer surface of the side parts of the semirings. This solution does not provide a sufficiently rigid fixation of the shape of the pipeline circumference due to the use of concrete half-rings with a reinforcing frame, therefore, when performing repair work, for example, technological cutting of a defective section of the pipeline, deformation may occur at the end of the first cut. In addition, paired half rings have a strictly defined size, therefore, use is possible only for one pipeline diameter.

Pipe cutting and chamfering machines. Centralizers and deovalizers. Tools for pipe repair https://alkor-pipe.ru/mathey_dearman_2013.pdf, date of caching information according to the site https://web.archive.org - 2013.09.09), containing a chain for lifting the centralizer, half rings connected pivotally, locking mechanism, swivel, fixed and locking clamps, symmetrically located stop screws, providing high accuracy of connection and deovalization of pipes/shells. When installing the centralizer-deovalizer on the pipeline, manual point tightening of the stop screws located along the circumference of the half-rings at a certain distance from each other will be required, which will lead to uneven pressure on the pipeline, which in turn will lead to pipeline deformation.

The technical problem lies in the fact that when repairing an underground pipeline, for example, technological cutting of a defective section of the pipeline, most of it is underground, and a small part is open (a pit is made), while the pressure of the surrounding soil mass affects the pipeline itself, due to which causes the pipeline to have a complex volumetric stress-strain state, which, at the end of the first cut, leads to deformation of the pipeline, for example, ovalization.

The technical result consists in expanding the arsenal of technical means that prevent mechanical deformation of the pipeline and allow performing repair work on different diameters of pipelines due to the formation of a rigid closed ring tightly enclosing the pipeline and fixing the pipeline circumference.

The technical result provides a device for repair work on an underground pipeline, containing a traverse with plates to which the guide is rigidly fixed, two counter-parallel half-rings, equipped with lugs mounted on the guide with the possibility of movement, and fixed with bolted connections, while recesses are made on the half-rings, connected with protruding linings of additional half rings and fixed with bolted connections.

Additionally, the traverse is provided with a mounting ring, or mounting hooks, or mounting holes.

It is preferable to make the main structural elements: traverse, plates, guide, semi-rings with recesses, additional semi-rings with protruding pads, mounting ring made of metal materials or composite materials.

It is advisable to make additional half-rings having an inner diameter corresponding to the types of pipeline diameters, and an outer diameter of the protruding linings corresponding to the outer diameter of the recesses of the half-rings.

The proposed device is illustrated by drawings:

fig. 1 - general view of the device without additional half-rings and without a pipeline;

fig. 2 – front view of the device without additional half rings;

fig. 3 – rear view of the device without additional half rings;

fig. 4 - general view of the device without additional half rings on the pipeline;

fig. 5 - general view of the device with additional half rings and without pipeline;

fig. 6 - front view of the device with additional half rings;

fig. 7 - general view of the device with additional half rings on the pipeline;

fig. 8 – general front view of additional half rings without pipeline;

fig. 9 is a general rear view of additional half rings without pipeline.

A device for repair work on an underground pipeline 1 (Fig. 1-7) contains a traverse 2 with plates 3, on which a guide 4 is rigidly fixed. the possibility of moving. At the ends of the semi-rings 5, holes 7 are made with guide grooves for bolted connections 8, with the help of which these semi-rings 5 are fixed to each other after installation on the pipeline 1. The inner diameter of the semi-ring 5 corresponds to the diameter of the pipeline 1, and the outer diameter is 5-25% larger than the diameter of the pipeline 1. As a result, a rigid closed ring is formed, uniformly tightly enclosing pipeline 1 and fixing the circumference of pipeline 1.

On the front side panels 9 (Fig. 1-2) of the semi-rings 5, recesses 10 are made ¾ of the length of the indicated semi-rings 5, while the recesses 10 are provided with through holes 11 (Fig. 1-4) for connection with two counter-parallel additional semi-rings 12 (Fig. 6-9) and fastening with bolted connections 13, which ensures the installation of the proposed device on the pipeline 1 of a smaller diameter than the inner diameter of the semi-rings 5.

Additional half rings 12 have an inner diameter corresponding to the diameter of the pipeline 1, and are made with protruding linings 14 (Fig. 8-9) ¾ of the length of the half rings 5 and an outer diameter corresponding to the diameter of the recesses 10 of the half rings 5, while the protruding linings 14 are provided with through holes 15 for connection with half rings 5 and fastening with bolted connections 13. Additional half rings 12 with their protruding linings 14 with through holes 15 are connected to recesses 10, provided with through holes 11, half rings 5 and fixed with bolted connections 13 (Fig. 6-9), forming a single semi-ring and providing a reduction in internal diameter for tight coverage of the pipeline 1 of smaller diameter. It is advisable to make additional half rings 12 having an inner diameter corresponding to the types of diameters of the pipeline 1, and an outer diameter of the protruding linings 14 corresponding to the outer diameter of the recesses 10 of the half rings 5. Thus, the use of additional half rings 12 having an inner diameter corresponding to different types of diameters of the pipeline 1, reduces the inner diameter of the half-rings 5 of the proposed device and allows its use on different diameters of pipelines, providing a tight grip and fixing the shape of the circumference of the pipeline, reducing the stress-strain state of the pipeline 1, leading to mechanical deformation, for example, ovalization.

Traverse 2 is made straight and provided with a mounting ring 16, mounting hooks (not shown in the figure), or mounting holes (not shown in the figure) located at the ends of the traverse 2, for engagement with a lifting device, for example, a hook or slings of a pipelayer / crane (not shown in Fig.).

The main elements of the proposed device: traverse 2, plates 3, guide 4, half rings 5, additional half rings 12 with protruding plates 14, mounting ring 16 can be made of metallic materials such as steel, titanium, etc. or from composite materials, provided that reliability is ensured.

The proposed device is used as follows:

The installer (not shown in Fig.) engages the hook of the lifting device (not shown in Fig.) for the mounting ring 16 (Fig.1-3, 5-6) of the traverse 2 (or mounting hooks (not shown in Fig.), or slings mounting holes (not shown in Fig.) located at the ends of the traverse 2) and lowers the proposed device into the pit to the pipeline 1, where it installs it at a distance of 100-300 mm from the place where the technological cut is made. The half rings 5 are moved on the lugs 6 along the guide 4 to the ends of the traverse 2 and then shifted towards the pipeline 1 until they close so that the half rings 5 cover the pipeline 1 (Fig.4). After closing, the semirings 5 are fixed on the pipeline 1 with bolted connections 8 in the holes 7. As a result, the semirings 5 form a rigid closed ring tightly enclosing the pipeline 1 (Fig. 4), which fixes the shape of the pipeline 1 circumference and reduces the stress-deforming state of the pipeline 1, resulting in to mechanical deformation, for example, ovalization.

When installing the proposed device on the pipeline 1 with a diameter smaller than the diameter of the half-rings 5, to ensure tight coverage of the pipeline 1 use additional half-rings 12 (Fig. 5-9).

To do this, each half ring 5 with a recess 10 and holes 11 is connected to the holes 15 of the protruding lining 14 of the additional half ring 12 and fixed with bolted connections 13 (Fig. 5-6), forming a single half ring 5 with an additional half ring 12, which reduces the inner diameter of the proposed device to install it on the pipeline 1 with a diameter less than the diameter of the half ring 5. The protruding pad 14 (Fig. 8-9), having a length of ¾ of the length of the half ring 5 and an outer diameter corresponding to the outer diameter of the recesses 10 of the half rings 5, when connected to the recess 10, having the length is ¾ of the length of the half ring 5, rests on the "bottom" of the recess, which prevents slipping of the vertically located half ring 5 and the additional half ring 12. Then the single half rings 5 with additional half rings 12 are moved along the guide 4 to the ends of the traverse 2. shown) engages the hook of the lifting device (not shown in Fig.) for the mounting ring 16 of the traverse 2 and lowers the proposed device to the pipeline 1 in the pit, where it installs it on the pipeline 1 at a distance of 100-300 mm from the place where the technological cut is made. Half rings 5 with additional half rings 12, moving on the lugs 6 along the guide 4, are shifted in the direction of the pipeline 1 until they close so that the half rings 5 cover the pipeline 1 (Fig. 7). After closing, the half rings 5 with additional half rings 12 are fixed on the pipeline 1 with bolted connections 8 in the holes 7. As a result, the half rings 5 with additional half rings 12 form a rigid closed ring tightly enclosing the pipeline 1 (Fig. stress-strain state of the pipeline 1, leading to mechanical deformation, for example, ovalization.

Example 1

The proposed device was installed on a pipeline with a diameter of 1020 mm. Half rings 5 have an outer diameter of 1225 mm, an inner diameter of 1020 mm. The installer (not shown in the figure) hooked the hook of the lifting device (not shown in the figure) to the mounting ring 12 of the traverse 2 and lowered the proposed device to the pipeline 1 in the pit, where he installed it on the pipeline 1 at the place where the technological cut was made, moving along the guide 4 eyelets 6 half rings 5 so that half rings 5 embraced pipe 1. After closing half rings 5, I fixed them on pipeline 1 with bolted connections 8 in holes 7. As a result, half rings 5 tightly covered pipeline 1 with a diameter of 1020 mm, forming a rigid closed ring. The first technological cut of pipeline 1 was performed using a plasma cutting device, while a rigid closed ring formed by half rings 5 fixed the shape of the pipeline 1 circumference, which reduced its stress-strain state and excluded mechanical deformation of the pipeline, i.e. ovalization did not occur, therefore, the proposed device fulfilled its purpose and provided the technical result. Next, the cutting of the defective section of the pipeline 1 was continued without the risk of its deformation.

Example 2

The proposed device is installed on a pipeline with a diameter of 720 mm. Half rings 5, having an outer diameter of 1225 mm and an inner diameter of 1020 mm, were connected to additional half rings 12. For this, holes 11 of recesses 10 made on half rings 5 were connected to holes 15 of protruding linings 14 of additional half rings 12, which reduced the inner diameter of the proposed device up to a diameter of 720 mm, corresponding to the diameter of the pipeline 1. The protruding pad 14, having a length of ¾ of the length of the additional half ring 12, when connected to the recess 10, having a length of ¾ of the length of the half ring 5, rested on the “bottom” of the recess, which prevented slipping of the vertically located half ring 5 and additional half ring 12. Then a single half ring 5 with additional half ring 12 was moved along the guide 4 to the ends of the traverse 2. (Fig. 5).

After that, the installer (not shown in the figure) hooked the mounting hooks (not shown in the figure) with the slings of the lifting device, located at the ends of the traverse 2, lowered the proposed device into the pit to the pipeline 1, where he installed it at the place where the technological cut was made, moving along guide 4 eyelets 6 half rings 5 with additional half rings 12 so that they cover the pipeline 1. He closed the half rings 5 with additional half rings 12 and fixed the half rings 5 on the pipeline 1 with bolted connections 8 in the holes 7. As a result, half rings 5 with additional half rings 12 tightly covered the pipeline 1, forming a rigid closed ring. The first technological cut of pipeline 1 was performed using a gas cutting device, while a rigid closed ring formed by half rings 5 with additional half rings 12 fixed the shape of the pipeline 1 circumference, which reduced its stress-strain state and excluded mechanical deformation of the pipeline 1, i.e. ovalization did not occur, therefore, the proposed device fulfilled its purpose and provided the technical result. Next, the cutting of the defective section of the pipeline 1 was continued without the risk of its deformation.

Claims (4)

1. A device for repair work on an underground pipeline, containing a traverse with plates, to which the guide is rigidly fixed, two counter-parallel half rings, equipped with lugs mounted on the guide with the possibility of movement, and fixed with bolted connections, while the half rings are made recesses connected with protruding overlays of additional half rings and fixed with bolted connections. 2. A device for repair work on an underground pipeline according to claim 1, characterized in that the traverse is equipped with a mounting ring, or mounting hooks, or mounting holes. 3. A device for repair work on an underground pipeline according to claim 1, characterized in that the main structural elements: traverse, plates, guide, half rings, linings, mounting rings are made of metal materials or composite materials. 4. A device for repair work on an underground pipeline according to claim 1, characterized in that the additional half rings have an inner diameter corresponding to the types of pipeline diameters, and an outer diameter of protruding linings corresponding to the outer diameter of the semiring recesses.

Images